[imp] 2-Step Authentication

[Simon Brereton]

Hi

Are you planning to implement 2-step authentication in the next Horde release?

http://www.codinghorror.com/blog/2012/04/make-your-email-hacker-proof.html

It would be relatively trivial so long as a mobile app can be written
(and that could be done in html5, so it shouldn't need to be device
dependent).

If not, let me know and I'll add a feature request.

Thanks.

Simon